Get kspersky antivirus 7.0 and install with the keys ,ie activation to prolong the date up to 2009.scan your computer,and update, me think this can take care of all your problems, and at the same time do some proactive protection. not sure of your bearing? call #08055475689.

Me thinks the best thing you have to do is to get a genuine copy of winxp,i had similar problems when i was running xp on fujitsu simens until i was able to order for a genuine copy of winxp, and installing mp11 and other softwares became a thing of the past. interested? write saint.stokey@yahoo.co.uk

You can install what we call virtual pc on the your pc, but make sure you have enough space on your hdd. after installing the virtual pc/ winxp, you can now install all other softwares that cannot be installed on your vista. but first, upgrade to sp1 vista which can be downloaded from microsofts web site.
the virtual pc installer can as well be downloaded from microsoft web site goodluck.

i think the best bet for your dv600 is to format, or simply try uninstalling the wireless drivers and re-installing them again. if this does not fix the problem,
try calling me on the no#08055475689, i had similar problems before with my dv2500. it was a running battle until iwas able to take control of the whole problem. i stay in port harcourt as well SaintSTOKEY.